Authors
Valeria Z. Racheva
Department of Clinical Laboratory, Clinical Immunology and Allergology, Medical University – Pleven
Adelaida L. Ruseva
Department of Clinical Laboratory, Clinical Immunology and Allergology, Medical University – Pleven
Svetlana A. Mateva
Department of Pathoanatomy, Medical University – Pleven
Ivan Tsv. Malkodanski
Department of Anaesthesiology and Intensive Care, Medical University – Pleven